Excavation of the pit will cause the rebound

the deeper the excavation is

the greater the rebound will be; the large amount of rebound will cause a variety of engineering problems. Existing rebound calculation methods require specialized rebound experiment or a particular stress path experiment to determine the unloading modulus. The application of modulus obtained from conventional laboratory tests and commonly used Mindlin solution and Boussinesq solution combined in a simple and practical way to get the rebound is studied in this paper. Four calculation methods for different combinations between the stress calculation of the Mindlin solution and Boussinesq solution and the deformation calculation of e- model and Duncan-Chang model

are obtained; and then the amount of rebound is calculated by the application of the layerwise summation method; and the accuracies of four methods are explored respectively. A more practical method for the application of engineering excavation rebound calculation is obtained. Compared with the measured values

the Mindlin solution and e- model are recommended respectively to calculate the stress and modulus; and then a calculated rebound which is very accurate to the measured values can be obtained with the application of the layerwise summation method.